元素成份 meaning in English

elementary composition

These are obviously different from other delta region and foothill region , how is the underwater element so special if there is no space objects
这和其他的三角洲和丘陵地区相比很不一样，如果没有天外来客，此地的地下水体元素成份怎会如此特殊？
In addition , conventional surface analytical tools , i . e . , leed and aes , are also equipped to provide surface information of long - range order and elemental identity
传统的表面分析设备如低能电子绕射仪( leed )及欧杰电子能谱仪( aes ) ，则用来决定晶体表面的长程结构和元素成份。